.87 or .89 torsion bars wanted for 65 Barracuda

Others who commented on interchangability are correct. ALL "A" body bars are interchangeable from '60 - '76. I like your choice of diameter if you have a front sway bar also. Without one, I'd buy the aftermarket 1.03 dia. Not a recommendation but rather my preference. But I don't mind a little tooth rattle or kidney shake if I hit a pothole with the large dia. bars. :)